| Primo Engineering Limited | Manufacturing | 2023 |
| Print Buyers & Marketing Support Limited | Professional & scientific | 1996 |
| Print Space Innovation Ltd | Manufacturing | 2024 |
| Printhelp Limited | Information & communication | 1990 |
| Prior's Court Services Limited | Education | 2019 |
| Prior's Court Trading Limited | Agriculture & fishing | 2017 |
| Pro Green Book Limited | Information & communication | 2015 |
| Pro Supreme Clean Ltd | Administrative & support | 2021 |
| Pro-Vision Lifestyles Limited | Information & communication | 2019 |
| Progress Boxing & Fitness Limited | Arts & recreation | 2012 |
| Project 4 Consultancy Ltd | Information & communication | 2020 |
| Project Franchising Limited | Administrative & support | 2013 |
| Project Holdings Limited | Financial services | 2016 |
| Project Veyra Ltd | Wholesale & retail | 2025 |
| Prompt Autos Limited | Wholesale & retail | 2005 |
| Prosfora Solutions Ltd | Professional & scientific | 2017 |
| Prospect One Ltd | Administrative & support | 2026 |
| Protonomical Ltd | Construction | 2024 |
| Proust Consulting International Limited | Professional & scientific | 2003 |
| PSP Digitech Ltd | Information & communication | 2018 |
| Psquarev Consulting Limited | Information & communication | 2016 |
| Psquarev Homes Limited | Real estate | 2019 |
| PSS Europe Limited | Information & communication | 2026 |
| PTM International Limited | Transport & logistics | 1997 |
| PTM Services Limited | Real estate | 2005 |
| Pure Inspired Therapy Ltd | Extraterritorial | 2021 |
| Purple Star Projects Limited | Information & communication | 2016 |
| PY Trading Ltd | Wholesale & retail | 2015 |
| PYM Translogistic Limited | Wholesale & retail | 2016 |
| Pyotts Management Company Limited | Households | 1988 |
| Pyxis Insights and Marketing Consulting Limited | Professional & scientific | 2011 |
| Qdio Music Technologies Ltd | Information & communication | 2018 |
| QL Group Ltd | Manufacturing | 2018 |
| QL Partnership Limited | Arts & recreation | 2010 |
| QLP Holdings Limited | Arts & recreation | 2017 |
| Qudos Certification Limited | Administrative & support | 2016 |
| Quester Global Limited | Administrative & support | 2021 |
| Quicklight Limited | Manufacturing | 2000 |
| Quicktest Limited | Manufacturing | 2006 |
| Quoin Building Consultants Limited | Professional & scientific | 2013 |
| R & E Geotechnical Consultants Ltd | Construction | 2008 |
| R Canning Carpentry Ltd | Construction | 2017 |
| R Gracie Academy Ltd | Arts & recreation | 2023 |
| R L J Hartley Limited | Administrative & support | 2017 |
| R'Ellite Raiments Ltd | Wholesale & retail | 2010 |
| R. J. Collins Roofing Contractors Limited | Construction | 2006 |
| R. Willoughby & Sons Ltd | Construction | 2003 |
| R.A.Poole & Co (Stainless) Ltd | Wholesale & retail | 2004 |
| R.Mann Builders Ltd | Construction | 2020 |
| R3VAMP Limited | Professional & scientific | 2022 |
| RA & MD Butler Ltd | Manufacturing | 2020 |
| Rachel Jane Media Limited | Arts & recreation | 2015 |
| Rachel Sadler Ltd | Professional & scientific | 2024 |
| Radiance Beauty Lounge Limited | Other services | 2017 |
| Raghav Foods Ltd | Hospitality | 2024 |
| RAM Communications Limited | Information & communication | 1996 |
| Ramc Consultancy Limited | Information & communication | 2021 |
| Ramc Hygiene Technologies Ltd | Administrative & support | 2023 |
| Raybureau Engineering Supplies Ltd | Professional & scientific | 2002 |
| RBC Building & Groundworks Ltd | Construction | 2012 |
| RC Electrics (South) Ltd | Construction | 2014 |
| Rcvry Injury Clinic Ltd | Health & social care | 2025 |
| RDM Legal Limited | Professional & scientific | 2024 |
| Reade Lane Property Limited | Real estate | 2017 |
| Real Reads Ltd | Administrative & support | 2007 |
| Reallife Design Solutions Ltd | Information & communication | 2020 |
| Red 76 Tax Ltd | Professional & scientific | 2014 |
| Red and Blue Trading Limited | Arts & recreation | 2016 |
| Red Balloon Property Services Ltd | Real estate | 2020 |
| Red Liberty Ltd | Wholesale & retail | 2019 |
| Redbridge UK Property Ltd | Real estate | 2021 |
| Redmax Limited | Administrative & support | 2009 |
| Reflective Strategy Limited | Professional & scientific | 2025 |
| Refurb Chris Limited | Administrative & support | 2017 |
| Regent Spirit Limited | Extraterritorial | 2014 |
| Regent Superbowl Limited | Arts & recreation | 2013 |
| Rehab Zone Limited | Health & social care | 2019 |
| REK Properties Ltd | Real estate | 2016 |
| Relocation Solutions Limited | Real estate | 2019 |
| Rennway Construction Ltd | Construction | 2017 |
| Repair & Renovate Ltd | Construction | 2019 |
| Resell Vault LLP | | 2025 |
| Reshape AI Ltd | Information & communication | 2023 |
| Resimo Ltd | Real estate | 2024 |
| Response Electrical Solutions Limited | Construction | 2025 |
| Retail Impact Limited | Administrative & support | 2005 |
| Reynolds Court (Thatcham) Management Company Limited | Households | 1980 |
| RGC Construction Limited | Construction | 2013 |
| Richard Hopes Limited | Professional & scientific | 2005 |
| Richfield Print Management Ltd | Manufacturing | 2012 |
| Rise Within Coaching Ltd | Administrative & support | 2025 |
| Rise Within Rituals Limited | Other services | 2025 |
| Rising Fifth Solutions Ltd | Professional & scientific | 2020 |
| Riverside Pools Limited | Construction | 2023 |
| Riverside Property Management Limited | Households | 2016 |
| RJV Enterprises Ltd | Hospitality | 2022 |
| Rknet-Demon Ltd | Information & communication | 2018 |
| RM Food & Wine Ltd | Wholesale & retail | 2022 |
| RM Power Services Ltd | Construction | 2016 |
| RNR Motors Ltd | Wholesale & retail | 2021 |